Honey, it is nobody's business how much you spend on your wedding. Plan the wedding you can afford and enjoy it without guilt. Stop talking wedding plans with your Mom. Unless she is paying, it is not her business. Trying to impress her friends with YOUR wedding is really tacky of her.
I married into a very wealthy family. My wedding was a small church wedding with a cake and punch reception in the fellowship hall. FILS were embarrassed, but they didn't offer to help with expenses. We have no regrets.
Good luck, and keep an eye on those expenses!